Engine.



c. CORNETT.

ENGINE.

APPLlCATlON. FILED NOV. 25. 1916.

1,259,366. Patented Main 12, 1918.

H 2 SHEETS-SHEET l.

HIE 504 a 49 2 Mama C. CORNETT.

ENGINE.

APPLlCATlQN FILED NOV. 25. 1916.

htented Mar. 12, 1918.

2 SHEETS-SHEET 2.

Gamm

CHARLES CORNETT, OF PLEASANTON, IOWA.

ENGINE.

Specification of Letters Patent.

PatentedMar. 12, 1918.

Application filed November 25, 1916. Serial No. 133,379.

To all whom it may concern.

Be it known that 1, CHARLES CORNETT, a citizen of the United States, residing at Pleasanton, in the county of Decatur and State of Iowa, have invented certain useful Improvements in Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

The present invention relates to an improvement in valves, particularly of the rotary type, and has for an object to provide a construction of valve adapted particularly for use in conjunction with internal combustion engines, and wherein the usual reciprocating or tappet valves may be eliminated.

It is another object of the invention to provide an internal combustion engine with a head peculiarly formed to provide a water jacketed valve casing containing both inlet and exhaust ports, and providing a bearing for a single rotatable member which is peculiarly formed to serve in the dual capacity of an intake valve and an exhaust valve.

Other objects and advantages will be more particularly brought out in the following detailed description of the present preferred embodiment of the invention, the same be ing illustrated in the accompanying drawings, wherein,

Figure 1 is a side elevation of one end of an internal combustion engine, the view showing a pair of cylinders cast en bloc, and showing the detachable head constituting the valve casing of the valve of this invention;

Fig. 2 is a vertical longitudinal section taken centrally through the engine and the improved valve as applied thereto, on the line 22 of Fig. 4.

Fig. 3 is a detail side elevation of the turning plug of the valve.

Fig. 4 is a transverse section taken on the line 4.t of Fig. 2, showing the arrangement of the upper and lower laterally extending intake and exhaust ports, with the valve turned to show the ports in section.

Referring to this drawing, wherein like parts are designated by similar numerals of reference throughout the several views, 10 designates the crank case of an internal combustion engine provided with a pair of integrally cast cylinders 11 in the usual manner. The cylinders 11 are open at their upper ends, and are adapted to be closed by a cap plate or head 12 which extends over both of the cylinders to close the same. The head 12 is provided with a central longitudinally extending bore 13 which preferably tapers from end to end and which is surrounded by a water jacket or space 14: communicating with the water jacket 15 of the integrally cast cylinders 11. The head 12 is provided in its lower wall, and immediately above each cylinder 11 with a pair of laterally spaced apart ports, one port 16 of each cylinder constituting an exhaust port, and the opposite port 17 of each cylinder constitutinc an intake port.

he head 12 is further provided in its upper wall, and preferably intermediate the cylinders 11 with laterally and oppositely extending intake and exhaust port-s 18 and 19 respectively.

From Fig. 4 it will be noted that the upper intake port 18 is arranged diametrically opposite to the lower intake port 17, and that the exhaust ports 16 and 19 are arranged in diametrically opposed positions. \Vithin the bore 13 of the head 12 is placed a preferably tapered turning plug 20. The turning plug 20 is held in the head by means of a face plate 21 which is bolted or otherwise suitably secured against the outer end of the head 12. The plate 21 is provided with a bearing opening 22 therein adapted to receive a spindle 23 projecting forwardly from the enlarged end of the turning plug. As shown in Fig. 1, the spindle 23 may be provided with a worm wheel 24 with which meshes a worm 25 carried upon the upper end of a valve operatlng shaft 26. The shaft 26 is preferably provided upon its lower end with a second worm 27 meshing with a second worm wheel 28 mounted on .a shaft 29, which may be the crank shaft, the latter driving the rotary valve at one half the speed of the crank shaft.

The head 12 is provided at its opposite sides, and about the intake and exhaust ports 18 and 19, with outwardly extending pins 30 to which may be secured intake and exhaust manifolds 31 and 32 respectively. The turning plug 20 is provided with a pair of inclined slots or passages 33 and 34:, the same extending diametrically through the plug, and opening through the periphcry of the plug. From Fig. 3 it will be noted that the inner ends of the passages 33 and 34 terminate in diametrically op posed ositions. The turning of the plug 20 registers the slots 33 and 34 alternately with the inlet and exhaust ports 18 and 19 formed in the top of the head 12. The opposite or outer ends of the slots 33 and 34 terminate at diametrically opposed points,

. and are adapted to register simultaneously 20 and drive it continuously and without impact or any reciprocating movement. The plug 20 is therefore held from vibration, and turns smoothly in the head 12. The

"ports 33 and 34 of the turning plug are brought one at a time into register with the upper intake and exhaust ports 18 and 19 of the head, the opposite ends of the ports or slots 33 and 34 simultaneously registering with the lower ports 16 and 17 which open into the tops of the cylinders 11. In Fig. 4 the arrow indicates the direction in which the turning plug must rotate so that the gases from one of the cylinders are exhausted, and so that that cylinder is then placed in communication with the intake port 18 to receive a fresh charge for the manifold 31. I

It will be noted that this improved rotary valve affords a direct intake and exhaust for the gases in an internal combustion engine, and raises the temperature of the charge as it is drawn into each cylinder of the engine to thus effect the even combustion and cooling of the exhaust gases as they pass through the water cooled head of the motor. This even heating of the charge and the exhaust gases eliminates back pressure, and increases the power. It also lessens the liability of back firing, and as the valve is of the rotary type, and is positively driven, it prevents any back firing incident to the sticking of the valves or the deposit of carbon thereon and thereabout. By the provision of this single rotary valve member the cost of manufacture and the maintenance of the valve control is considerably reduced, and vibration and noise are 0091:: o f thia patentmay be obtained for nates such usual employed devices as push rods, puppet valves, springs, and sleeves.

A set screw 35 with its lock nut may be placed at theend of the valve chamber and be adjusted so as to correctly position the ports 33 and 34 for registry with the exhaust and intake ports in the cylinder and in the valve casing.

'It is of course understood that various changes and modifications may be made in the structure of this valve to adapt "it to engines of various types Without departing from the spirit of this invention, such modifications and changes being limited only by the scope of the following claims.

What is claimed is v V 1. In an engine, cylinders open at one end, a head fitted upon the open ends of the cylinders, and provided with a se1nicylindrical valve casing therein a tapered turning plug fitted in the casing, said casing having inlet and exhaust ports intersecting the valve casing, said turning plug being slotted to establish communication between the intake and exhaust ports, and means on the smaller end of the turning plug for longitudinally adjusting said plug for correctly positioning the intake and exhaust ports and regulating the fit of the plug within the casing. 2. In an engine, jacketed cylinders open at the upper end, a semi-cylindrical closing head secured to the cylinders, a tubular valve casing formed longitudinally of and in spaced relation to the head and providing jackets in communication with the cylinder jackets, spaced intake and exhaust ports formed in the head and establishing communication between the lower wall of the casing and the cylinders, laterally opposed intake and exhaust ports formed in the head and the upper wall of the casing and disposed diametrically opposite to the five cents each, by addressing the Commissioner 9,! yatentl, Washington, D. 0. 

